What makes a tube amplifier worth $55,000? Nothing. But the NAT Audio Magna Amplifier sure tries to justify its ludicrous price tag, delivering 160W of pure, testosterone-piquing power. It uses three different tubes to achieve this, the 6N1P-EV, the 6N30P-DR and the Eimac 450TH. The whole thing weighs in at a hefty 88… »11/15/07 10:00am 11/15/07 10:00am